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WorksheetsLevel 2 Plumbing Central Heating
Total questions: 40
Worksheet time: 20mins
A heating system which relies completley on natural convection to work would be better known as......
Semi gravity
Fully pumped
Full gravity
C plan
This type of system is known as a.........
Fully pumped system
Semi gravity system.
Diverter valve system.
Zone valve system.
Building Regulations Approved Document L1A refers to what?
Energy efficiency for new build properties
Enegry efficiency in older properties.
Energy efficiency for central heating systems.
Energy efficiency in hot water systems.
The purpose of increasing energy efficiency is to.......
Save the consumer money.
To protect the environment.
To preserve our fossil fuels.
All of the above.
How does the water circulate through the radiators in a one pipe system?
Forced circulation using a pump.
Natural convection.
Semi gravity.
Fully pumped.
This thermomechanical valve would be used to control......
The flow of water to the cylinder.
The temperature of the hot water.
Anti gravity valve on the central heating.
The temperature of the central heating.
An injector tee would be found where?
Close to the boiler on the primary flow to the cylinder to get better flow rates through the coil.
On the central heating flow to ensure adequate flow of water to each radiator.
Close to the boiler on the central heating return to allow the cylinder gravity return to mix with it.
On the cold feed to the central heating system to ensure the system fills correctly.
The purpose of an anti gravity valve is to.........
Prevent the upstairs radiators from cooling down too quickly.
Allow the upstairs radiators to heat up evenly.
Prevent the upstairs radiators from heating up in the summer time due to natural convection.
To prevent the upstairs radiators from getting too hot to touch.
The 'bar' is used to measure what?
Atmospheric pressure
Water pressure
System pressure
Head of pressure
This valve is a .......
Temperature relief valve
Pressure relief valve
Thermo valve
Automatic air release valve
The purpose of this is to ....
Allow for the expansion of the system pipework
Allow for the expansion of the water in the system
Allow for the expansion of steam in the system
Allow for the expansion of the air in the system
The type of system a Honeywell 'S' plan is....
3 port mid position valve
3 port diverter valve
2 x 2 port zone valves
3 x 2 port zone valves
A diverter valve system
Gives central heating priority
Gives hot water priority
Gives heating and hot water the same priority
Gives a mixture of central heating and hot water priority
A 'heat leak' radiator is used to .......
Remove excess heat from the room.
Allows more heat to come off the radiator.
Remove excess heat from the system to prevent 'venting over'
Remove excess heat from the system to prevent pipework from expanding too much.
What fitting is this?
Brass stop end.
Brass 3 way adaptor
Brass 3 port reducer
Brass pipend manifold
This type of fitting would be on a ......
Small bore only system
Small bore to microbore system
Multi pipe system.
One pipe system.
If I was using soft fully annealed pipe what grade would it be?
R250
R220
R290
R200
How high should the open vent pipe on a central heating system extend?
150mm above the water line
250mm above the water line
350mm above the water line
450mm above the water line
To calculate the height above the pump the F&E cistern should be installed we.....
Divide the minimum head of the pump by 3
Divide the medium head of the pump by 3
Combine the minimum and maximum head of the pump and divide by 3
Divide the maximum head of the pump by 3
You would find the neutral point in a system at....
The boiler
The last tee cylinder return at the boiler
The pump
Where the cold feed enters the central heating system
When installing a open vented fully pumped heating system it is important which rule if followed?
1 tee rule
2 tee rule
3 tee rule
4 tee rule
The open vent and cold feed in a fully pumped system should not be installed further than........
100mm apart
125mm apart
150mm apart
175mm apart
This fitting is called........
Anti gravity valve
Cytrol valve
Air seperator
Water seperator
This type of heat emitter is known as......
Towel rail
Skirting heater
Radiator
Column radiator
The valve is
Anti gravity valve
Cytrol vale
2 Port valve
Auto bypass valve
A boiler which is filled off the main water supply but can be connected to either a open vented hot water cylinder or a unvented cylinder is a ...........
Heat only boiler
System boiler
Combination boiler
Balanced flue boiler
This condition shown is known as
Steaming
Venting
Pluming
Cooling
An F&E cistern need to comply with Byelaw 30
True
False
The purpose of fitting a bypass valve is to
Allow water to circulate through the radiators after the motorized valve has closed.
Allow water to circulate between the flow and return from the boiler after the motorized valve has closed.
Allow water to circulate through the cylinder after the motorized valve has closed.
Allow water to circulate through the boiler to balance the system.
The 'index' circuit is the part of the system which.....
Provides the best flow rates.
Get's the hottest.
Offers the greatest resistance to flow.
Allows the radiators to heat more effectively.
Which of these is the correct order for the 3 Tee rule
cold feed, open vent, cylinder return
Cylinder return, cold feed, open vent
open vent, cold feed, cylinder return
open vent, cylinder return, cold feed
The water in a central heating system will expand by...........
14%
Not at all
10%
4%
The type of flue shown in the picture is known as..
Natural draught
Conventional flue
Fan assisted flue
Natural draught balanced flue
The deposit on the inside of the pipe shown is..........
Black sludge
Iron oxide
The black gunge
Copper oxide
This deposit is a result of ..........
Not flushing the system through correctly
Air being drawn into the system
Electrolysis
Too much flux being used to solder joints.
This device is used to......
Control the temperature of hot water
Control the temperature of central heating
To stop the system from freezing
Control the temperature of the boiler
The name given to the series of controls which shuts down the system completely is .........
System control locking
Boiler control lock
Boiler interlock
Interlocking boiler
For what purpose is this used in a central heating system?
To ensure no water flows through the radiators in the summer time.
To circulate heated water around the central heating system.
To allow the upstairs radiators only to heat up.
To pump heated water through the gravity primary circuit.
Which of these is the correct size fuse rating for a central heating and hot water system?
1 Amp
3 Amp
5 Amp
13 Amp
The purpose of this is to.....
Reduce velocity noise through the pipework.
Increase the amount of heat the radiators emit.
Reduce the amount of ferrous oxide in the water returning to the boiler by use of a magnet.
Descale the water returning to the boiler to prevent the boiler "furring up"
